Twenty-one more independent games will be distributed on Valve's Steam distribution service thanks to fan feedback through its Steam Greenlight initiative.

There are few surprises in the list of newly-approved games. Players utilizing the semi-democratic voting system continue to favor titles in the popular first-person shooting genre, as well as Minecraft-like "voxel sandbox" games, MMOs, games with retro-inspired pixel aesthetics, and titles that categorize themselves as "survival horror".

What you won't see, however, are games that are readily available. Of the thirty total games that have been "greenlit" to date, only one -- Sos Sosowski's point-and-click adventure McPixel -- is complete and purchasable.

In fact, Valve says that the often far-off ship dates of games that were up-voted by the community was a factor in increasing its approval list from ten to twenty titles this time around.

As with the initial round of approved games, it would appear that having an established fan base -- even without necessarily having a game for them to play -- is crucial for getting noticed on Greenlight, as the majority of its games continue to be those that have generated some amount of hype prior to being put to the vote.

The full list of twenty-one games approved for Steam today via Greenlight is as follows: